I can help you with the transportation problem to those places. I am wondering you mean the how to go from your hotel?
The hotel is just close to Mongkok mtr station. you can use mtr to those places.
Disneyland: Mongkok - Lai King - Sunny Bay - Disneyland, about 32 minutes for 18HKD
Ocean Park: use mtr to Admiralty, 10.5HKD for 10 minutes. Then get out from Exit B2 to find bus 629 to Ocean Park directly. 10.6HKD for the ticket price, 25 minutes.
Victoria Park: it can be reached by walk from Admiralty mtr station .

Thank you so much for the information you've given to me, Ms. Liz. I just look at the website on the Hostel that were about to stay. I bet it's easy to locate. Anyway, are there tourist guide in the airport that we can hire directly? OR can we handle it by ourselves in touring HK? Thank you so much, I really appreciate your kindness.. :)

Well, I think that you needn't hire a tour guide. The transportation is very convenient. You can handle your tour on your own.

Thank you so much for your advice Mr. Dan. We also plan to go to Macau. Just a day tour. Are the A-ma Temple, St. Paul's Church and Venetian Canal easy to locate? What are the means of transportation? Were going to take a ferry at TST. How much is the cost and time that we will spend on the ferry? Thank you so much. :)